post" poll, 63% of registered voters, a 2-1 margin, expect president obama to win the upcoming debate and the election. that's his biggest lead so far when it comes to expectations. >> but when it comes to the race itself and support for each candidate, a lot closer with the president leading 49% to 47%. we get more of wednesday's debate in denver from abc's karen travers. >> reporter: president obama arrived in nevada for three days of what campaign aide are calling debate camp. but he took a break to rally supporters in that critical battleground state. >> i believe in you. and i ask you to keep on believing in me. >> reporter: both the president and mitt romney will hunker down over the next few days as they huddle with senior advisers to prepare for wednesday's high-stakes showdown in denver. in recent days aides to both campaigns have been bending over backwards to compliment their opponent and downplay expectations for their side. new jersey governor chris christie set a high bar for romney. >> this is the first moment when the american people are going to be able to see these t